How do I fix an invalid IMEI on my iPhone?

And IMEI cannot be invalid, any more than its equivalent, the Vehicle Identification Number (VIN) for your car. It is an intrinsic and permanent identification of the cellular radio in your iPhone.

nijam291 wrote:

imei1 is invalid

[Re-Titled by Moderator]

So from where and from whom did you obtain this iPhone? And what makes you think the IMEI is invalid? Sounds like it is either a counterfeit or the phoneI has been blacklisted by a carrier.

Writing an effective Apple Support Commun… - Apple Community